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  <title>MSE: Don't get stuck buffering for too long when we have frames to show</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="mediasource.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<pre id="test"><script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

// This test loads partial video, plays and waits until playback stalls.
// It then loads only 3 frames of a video at higher resolution.

var receivedSourceOpen = false;
runWithMSE(function(ms, v) {
  ms.addEventListener("sourceopen", function() {
    ok(true, "Receive a sourceopen event");
    ok(!receivedSourceOpen, "Should only receive one sourceopen for this test");
    receivedSourceOpen = true;
    var sb = ms.addSourceBuffer("video/mp4");
    ok(sb, "Create a SourceBuffer");

    // Log events for debugging.
    var events = ["suspend", "play", "canplay", "canplaythrough", "loadstart", "loadedmetadata",
                  "loadeddata", "playing", "ended", "error", "stalled", "emptied", "abort",
                  "waiting", "pause", "durationchange", "seeking", "seeked"];
    function logEvent(e) {
      var v = e.target;
      info("got " + e.type + " event");
    }
    events.forEach(function(e) {
      v.addEventListener(e, logEvent, false);
    });

    sb.addEventListener('error', (e) => { ok(false, "Got Error: " + e); SimpleTest.finish(); });
    fetchAndLoad(sb, 'bipbop/bipbop', ['init'], '.mp4')
    .then(function() {
      var promises = [];
      promises.push(fetchAndLoad(sb, 'bipbop/bipbop', range(1,3), '.m4s'));
      promises.push(once(v, "loadeddata"));
      return Promise.all(promises);
    }).then(function() {
      is(sb.buffered.length, 1, "continuous range");
      v.play();
      // We have nothing to play, waiting will be fired.
      return waitUntilTime(v, 1.5);
    }).then(function() {
      return fetchAndLoad(sb, 'bipbop/bipbop_480_624kbps-video', ['init'], '.mp4');
    }).then(function() {
      sb.timestampOffset = 1.601666; // End of the video track buffered - time of first video sample (0.095).
      sb.appendWindowEnd = 1.796677; // Only allow room for three extra video frames (we need 3 as this video has b-frames).
      return fetchAndLoad(sb, 'bipbop/bipbop_480_624kbps-video', ['1'], '.m4s');
    }).then(function() {
      ms.endOfStream();
      var promises = [];
      promises.push(once(ms, "sourceended"));
      promises.push(once(v, "playing"));
      promises.push(once(v, "ended"));
      return Promise.all(promises);
    }).then(function() {
      if(v.width, 640, "has proper width");
      if(v.height, 480, "has proper height");
      SimpleTest.finish();
    });
  });
});
</script>
</pre>
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